The pointer I use to teach my biology classes and has long-range operation while I walk around the classroom.

By
Lawrence Ortiz

Pen Scanners

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Pen Scanners, Readers are pen-type readers which consist of a light source and a photodiode that are placed next to each other in the tip of a pen. They require the operator to swipe the pen over the code. The pen scanners are as handy as they are affordable (especially at Dinodirect.com).